#pragma once
#include <iostream>
#include <assert.h>

using namespace std;

class Stack
{
private:
	int* _a;
	int _top;
	int _capacity;
public:
	void Init();
	void Push(int x);
	void Pop();
	void Print();
};

class Date
{
public:
	Date(int year = 1, int month = 1, int day = 1);
	void Print();
public:
	int _year = 2;
	int _month = 2;
	int _day = 2;
};